/Engine/Source/Runtime/Core/Public/Logging/LogVerbosity.h
Enum that defines the verbosity levels of the logging system. Also defines some non-verbosity levels that are hacks that allow breaking on a given log line or setting the color.
namespace ELogVerbosity { enum Type { NoLogging = 0, Fatal, Error, Warning, Display, Log, Verbose, VeryVerbose, All = VeryVerbose, NumVerbosity, VerbosityMask = 0xf, SetColor = 0x40, BreakOnLog = 0x80, } }